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US4782011A Expired / Lapsed US ⏱️ 0.0 years remaining

Bisphenol derivative stabilizers

Assignee: Eastman Kodak Co
•
Filing: 1987-04-08
•
Granted: 1988-11-01
•
Expires: 2007-04-08
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Abstract

Abstract A photographic element comprising a support having thereon at least one silver halide emulsion layer having associated therewith a dye-forming coupler and a dye stabilizer comprising a bisphenol derivative having two linked phenol rings, one of the phenolic hydroxy groups being substituted and at least one of the phenol rings being substituted. In a preferred embodiment, the bisphenol derivative has the following formula: ##STR1## wherein A is a substituted or unsubstituted alkyl, cycloalkyl, alkenyl, aryl, acyl, alkylsulfonyl or arylsulfonyl group; X is a single bond or a linking group selected from alkylidene, a heteroatom or sulfonyl; and, each R independently represents one or more substituents, each substituent independently being a substituted or unsubstituted alkyl, alkenyl, cycloalkyl or aryl group; or each R in combination with the benzene ring to which it is attached independently represents the atoms necessary to complete a fused ring system.

Inventors

  • 👤 John D. Goddard
  • 👤 Nigel E. Milner
  • 👤 Llewellyn J. Leyshon

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 22:34
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/20; C07C43/23; G; G03; G03C; G03C7/00; G03C7/30; G03C7/392; G03C7/39208; G03C7/39212; G03C7/39216

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 114 words
A photographic element comprising a support having thereon at least one silver halide emulsion layer having associated therewith a dye-forming coupler and a dye stabilizer comprising a bisphenol derivative having the following formula: ##STR11## wherein A is a substituted or unsubstituted alkyl, cycloalkyl, alkenyl, aryl, acyl, alkylsulfonyl or arylsulfonyl group; X is a single bond or a linking group selected from alkylidene, a heteroatom or sulfonyl; and, each R independently represents one or more substituents, each substituent independently being a substituted or unsubstituted alkyl, alkenyl, cycloalkyl or aryl group; or each R in combination with the benzene ring to which it is attached independently represents the atoms necessary to complete a fused ring system.
Claim 2
Dependent Claim 114 words
A photographic element comprising a support having thereon at least one silver halide emulsion layer having associated therewith a dye-forming coupler and a dye stabilizer comprising a bisphenol derivative having the following formula: ##STR11## wherein A is a substituted or unsubstituted alkyl, cycloalkyl, alkenyl, aryl, acyl, alkylsulfonyl or arylsulfonyl group; X is a single bond or a linking group selected from alkylidene, a heteroatom or sulfonyl; and, each R independently represents one or more substituents, each substituent independently being a substituted or unsubstituted alkyl, alkenyl, cycloalkyl or aryl group; or each R in combination with the benzene ring to which it is attached independently represents the atoms necessary to complete a fused ring system.
Claim 3
Dependent Claim 48 words
The element of claim 1 wherein the bisphenol derivative has the formula: ##STR12## wherein A and X are as defined in claim 1; and R 1 , R 2 , R 3 and R 4 each independently represents a substituted or unsubstituted alkyl, alkenyl, cycloalkyl or aryl group.
Claim 4
Dependent Claim 21 words
The element of claim 2 wherein R 1 and R 3 are identical and R 2 and R 4 are identical.
Claim 5
Dependent Claim 48 words
The element of claim 2 wherein X is S or --(CR 5 R 6 ) n --, each R 5 and R 6 independently being hydrogen or a substituted or unsubstituted alkyl, cycloalkyl, alkenyl or aryl group and n is an integer of from 1 to about 10.
Claim 6
Dependent Claim 26 words
The element of claim 2 wherein the bisphenol derivative is present in an amount of from about 0.2 to about 2.0 moles per mole of coupler.
Claim 7
Dependent Claim 18 words
The element of claim 1 wherein R is CH 3 , C 4 H 9 -t or ##STR13##
Claim 8
Dependent Claim 42 words
The element of claim 2 wherein A is CH 2 C 6 H 5 , C 4 H 9 , COCH 3 , C 2 H 5 , COC 6 H 5 , OC--CH═CH 2 , OCCH 2 CH 3 , ##STR14##

References Cited (Backward Citations)

GB1267287A Cited
US4207393A Cited
US4363873A Cited
US4594314A Cited
US4621047A Cited
JPS61250641A Cited
JPS6243641A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-11-01 1992-05-02 1992-11-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-11-01 1996-05-02 1996-11-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-11-01 2000-05-02 2000-11-01 $7700.00 Window Closed / Lapsed

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